lunation
lu·na·tion
noun
1.
the period between successive new moons (29.531 days)
Origin
Borrowed from Medieval Latin lūnātiō.
Related words
Broader terms
Parts
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.